Deleting an Endocannabinoid Enzyme Changes How Mice Respond to Stress
Mice lacking NAPE-PLD, the enzyme that makes anandamide, showed altered stress responses and HPA axis function that varied depending on the type of stress context.
Quick Facts
What This Study Found
Genetic deletion of NAPE-PLD in mice altered stress responsiveness and HPA-axis functionality in a context-dependent manner, revealing the enzyme's role in fine-tuning the body's stress response system.
Key Numbers
Used NAPE-PLD knockout mice tested across multiple stress paradigms to assess context-dependent effects on behavior and HPA axis.
How They Did This
Preclinical study using NAPE-PLD knockout mice to examine how loss of this endocannabinoid-synthesizing enzyme affects behavioral stress responses and hypothalamic-pituitary-adrenal (HPA) axis function across different stress contexts.
Why This Research Matters
Understanding how the endocannabinoid system regulates stress has direct implications for anxiety and stress disorders. NAPE-PLD's role in stress regulation could reveal new therapeutic targets.
The Bigger Picture
The endocannabinoid system is increasingly recognized as a master regulator of stress responses. Understanding which enzymes and pathways are most important helps explain why cannabis affects stress and anxiety differently in different situations.
What This Study Doesn't Tell Us
Global gene knockout doesn't distinguish brain-region-specific effects. Mouse stress models have limited translational relevance. Compensatory mechanisms may develop in knockout animals.
Questions This Raises
- ?Could drugs targeting NAPE-PLD offer more nuanced stress/anxiety treatment than broad cannabinoid approaches?
- ?Why are the effects context-dependent rather than uniform?
Trust & Context
- Key Stat:
- Evidence Grade:
- Knockout mouse study providing mechanistic insights into endocannabinoid stress regulation — foundational science, not directly clinical.
- Study Age:
- Recent preclinical work advancing understanding of specific endocannabinoid enzymes in stress regulation.
- Original Title:
- Genetic deletion of NAPE-PLD alters stress responsiveness and HPA-axis functionality in a context-dependent manner in mice.
- Published In:
- Neuropharmacology, 281, 110702 (2025)
- Authors:
- Woodward, Taylor J(2), Dimen, Diana, Sizemore, Emily Fender, Stockman, Sarah, Kazi, Fezaan, Luquet, Serge, Mackie, Ken, Katona, Istvan, Hohmann, Andrea G
- Database ID:
- RTHC-07972
Evidence Hierarchy
Frequently Asked Questions
What is NAPE-PLD?
NAPE-PLD (N-acyl phosphatidylethanolamine phospholipase-D) is the enzyme primarily responsible for making anandamide, one of the body's own endocannabinoids that helps regulate mood, stress, and pain.
Why does context matter for the stress response?
The study found that losing NAPE-PLD didn't uniformly increase or decrease stress — it changed responses differently depending on the type of stress, suggesting the endocannabinoid system provides nuanced regulation rather than simple on/off control.
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Cite This Study
https://rethinkthc.com/research/RTHC-07972APA
Woodward, Taylor J; Dimen, Diana; Sizemore, Emily Fender; Stockman, Sarah; Kazi, Fezaan; Luquet, Serge; Mackie, Ken; Katona, Istvan; Hohmann, Andrea G. (2025). Genetic deletion of NAPE-PLD alters stress responsiveness and HPA-axis functionality in a context-dependent manner in mice.. Neuropharmacology, 281, 110702. https://doi.org/10.1016/j.neuropharm.2025.110702
MLA
Woodward, Taylor J, et al. "Genetic deletion of NAPE-PLD alters stress responsiveness and HPA-axis functionality in a context-dependent manner in mice.." Neuropharmacology, 2025. https://doi.org/10.1016/j.neuropharm.2025.110702
RethinkTHC
RethinkTHC Research Database. "Genetic deletion of NAPE-PLD alters stress responsiveness an..." RTHC-07972. Retrieved from https://rethinkthc.com/research/woodward-2025-genetic-deletion-of-napepld
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.